[英]Cannot go from one Page to a new Page while sending values in WPF C#
在我的MainWindow.xaml.cs中,使用以下命令打開一個新頁面(PkmnSelect):
PkmnSelect pkmnSelect = new PkmnSelect();
Content = pkmnSelect;
然后,一旦用戶在此頁面(PkmnSelect)中選擇了神奇寶貝團隊,他們就可以單擊“開始”。 “開始”按鈕具有以下代碼:
Battle battle = new Battle(userPokemon, opponentPokemon);
Content = battle;
Battle是我想將兩個Pokémon[]作為輸入的頁面,因此我在Battle中創建了一個額外的構造函數,如下所示:
public Battle(Pokemon[] userPkmn, Pokemon[] opponentPkmn) : this()
{
userPokemon = userPkmn;
opponentPokemon = opponentPkmn;
}
這給了我錯誤“頁面只能將Window或Frame作為父級”。
我的問題是,將值從一頁發送到另一頁的正確方法是什么? 我到處都看過,但沒有嘗試過。
編輯:Battle.xaml.cs的開始:
public partial class Battle : Page
{
Pokemon[] userPokemon;
Pokemon[] opponentPokemon;
public Battle()
{
InitializeComponent();
//Some code to hide some xaml stuff and start some music
}
public Battle(Pokemon[] userPkmn, Pokemon[] opponentPkmn) : this()
{
userPokemon = userPkmn;
opponentPokemon = opponentPkmn;
}
Page
內不能有Page
。
相反,您應該讓它們的公共父組件使用events處理過渡:
Pokemon
public class Pokemon
{
public string Name { get; set; }
}
PkmnSelect
<Page x:Class="WpfApp1.PkmnSelect"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:system="clr-namespace:System;assembly=mscorlib"
Title="PkmnSelect">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="Auto"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<ListBox Name="FirstPokemonList">
<system:String>Pikachu</system:String>
<system:String>Raichu</system:String>
<system:String>Rattata</system:String>
</ListBox>
<Label Grid.Column="1" VerticalContentAlignment="Center" FontSize="20" FontWeight="ExtraBold">VS</Label>
<ListBox Name="SecondPokemonList" Grid.Column="2" Margin="0,1,0,19" Grid.RowSpan="2">
<system:String>Pikachu</system:String>
<system:String>Raichu</system:String>
<system:String>Rattata</system:String>
</ListBox>
<Button Click="Button_Click" Grid.Row="1" Grid.ColumnSpan="3">FIGHT!</Button>
</Grid>
</Page>
public class PokemonsSelectedEventArgs : EventArgs
{
public Pokemon FirstPokemon { get; set; }
public Pokemon SecondPokemon { get; set; }
}
public partial class PkmnSelect : Page
{
public event EventHandler<PokemonsSelectedEventArgs> PokemonsSelected = delegate { };
public PkmnSelect()
{
InitializeComponent();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
PokemonsSelected(this, new PokemonsSelectedEventArgs
{
FirstPokemon = new Pokemon { Name = (string)FirstPokemonList.SelectedValue },
SecondPokemon = new Pokemon { Name = (string)SecondPokemonList.SelectedValue }
});
}
}
Battle
:
<Page x:Class="WpfApp1.Battle"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Battle">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="Auto"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<Label HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Content="{Binding UserPokemon.Name}" FontSize="40" FontWeight="ExtraBold"></Label>
<Label VerticalContentAlignment="Center" FontSize="20" FontWeight="ExtraBold" Grid.Column="1">VS</Label>
<Label HorizontalContentAlignment="Center" VerticalContentAlignment="Center" Content="{Binding OpponentPokemon.Name}" FontSize="40" FontWeight="ExtraBold" Grid.Column="2"></Label>
</Grid>
</Page>
public partial class Battle : Page
{
public Pokemon UserPokemon { get; set; }
public Pokemon OpponentPokemon { get; set; }
public Battle()
{
InitializeComponent();
DataContext = this;
}
public Battle(Pokemon userPkmn, Pokemon opponentPkmn) : this()
{
UserPokemon = userPkmn;
OpponentPokemon = opponentPkmn;
}
}
MainWindow
:
<Window x:Class="WpfApp1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:WpfApp1"
Title="MainWindow" Height="450" Width="800">
<local:PkmnSelect PokemonsSelected="PkmnSelect_PokemonsSelected"></local:PkmnSelect>
</Window>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void PkmnSelect_PokemonsSelected(object sender, PokemonsSelectedEventArgs e)
{
Content = new Battle(e.FirstPokemon, e.SecondPokemon);
}
}
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